Air
Quality Alerts and Advices

Unhealthy for Sensitive Groups air quality index in 2391 Willow Rd, Arroyo Grande, CA 93420, USA. It may cause breathing discomfort to people with lung disease such as asthma, and discomfort to people with heart disease, children and older adults.

Unhealthy for Sensitive Groups air quality index in 2391 Willow Rd, Arroyo Grande, CA 93420, USA. It may cause breathing discomfort to people with lung disease such as asthma, and discomfort to people with heart disease, children and older adults.

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Air Pollution in United States -
How to find AQI?

The United States Environmental Protection Agency (EPA) has developed an Air Quality Index that is used to report air quality. This AQI is divided into six categories indicating increasing levels of health concern. An AQI value over 300 represents hazardous air quality and below 50 the air quality is good.
The AQI is based on the five "criteria" pollutants regulated under the Clean Air Act: ground-level ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide. The EPA has established National Ambient Air Quality Standards (NAAQS) for each of these pollutants in order to protect public health. An AQI value of 100 generally corresponds to the level of the NAAQS for the pollutant.[11] The Clean Air Act (USA) (1990) requires EPA to review its National Ambient Air Quality Standards every five years to reflect evolving health effects information. The Air Quality Index is adjusted periodically to reflect these changes.